Definitions for: Polyvalent

[adj] (chemistry) having more than one valence, or having a valence of 3 or higher
[adj] (immunology) containing several antibodies each capable of counteracting a specific antigen; "a polyvalent vaccine"

Webster (1913) Definition: Po*lyv"a*lent, a. [Poly- + L. valens, p. pr. See
Valent.] (Chem.)
Multivalent.

Synonyms: multivalent

Antonyms: monovalent, univalent